Affordance returns to normal size after activation

There was a bug where the quick affordance button would remain scaled-up
after activation, if it opened another activity. This CL fixes that.

Fix: 263585543
Test: manually verified that the bug no longer reproduces by
long-pressing to start the camera app and then locking the device and
then getting AOD to display
TesT: manually verified that the other animations and interactions are
still working including the long press activation of on/off affordances
(tried flashlight) and the rejection shake animation

Change-Id: Ibc9a0579df713a677bb1fdee7e051c4ba7afac44